#pragma once 


#include <iostream>
#include <string>
#include <assert.h>
#include <cstdlib>
#include <vector>
#include <unordered_map>
#include <fstream>


#include "../comm/util.hpp"
#include "../comm/log.hpp"
#include "./include/mysql.h"
#include "login_and_register.hpp"

namespace ns_model
{

    using namespace ns_util;
    using namespace ns_logUtil;
    using namespace ns_login_register;
    struct Question
    {
        std::string number;  // 题号
        std::string title; // 题目的标题
        std::string star; // 难度
        std::string status; // 状态（是否通过）
        int cpu_limit;
        int mem_limit;
        std::string desc; // 题目的描述
        std::string header; // 题目预设给用户的代码
        std::string tail; // 题目的测试用例，需要和header拼接，形成完整代码

    };

    const std::string oj_questions = "oj_questions";
    const std::string host = "127.0.0.1";
    const std::string user = "oj_client";
    const std::string passwd = "Th18768696673++";
    const std::string db = "oj";
    const int port = 3306;


    class Model
    {

    public:
        Model()
        {
            
        }


        bool QueryMySql(const std::string &sql, std::vector<Question> *out)
        {
            // 创建mysql句柄
            MYSQL *my = mysql_init(nullptr);
            
            // 连接数据库
            if(nullptr == mysql_real_connect(my, host.c_str(), user.c_str(), passwd.c_str(), db.c_str(), port, nullptr, 0))
            {
                LOG(FATAL) << "连接数据库失败..." << std::endl;
                return false;
            }

            // 一定要设置编码格式，否则会出现乱码
            mysql_set_character_set(my, "utf8");

            LOG(INFO) << "连接数据库成功" << std::endl;

            // 执行sql语句
            if(0 != mysql_query(my, sql.c_str()))
            {
                LOG(WARNING) << sql << " execute error!" << std::endl;
                return false;
            }

            // 提取结果
            MYSQL_RES *res = mysql_store_result(my);
            
            // 分析结果
            int rows = mysql_num_rows(res); // 获得行数
            int cols = mysql_num_fields(res); // 获得列数

            Question q;

            
            for(int i = 0; i < rows; i++)
            {
                MYSQL_ROW row = mysql_fetch_row(res);
                q.number = row[0];
                q.title = row[1];
                q.star = row[2];
                q.desc = row[3];
                q.header = row[4];
                q.tail = row[5];
                q.cpu_limit = atoi(row[6]);
                q.mem_limit = atoi(row[7]);

                out->push_back(q);
            }

            free(res);
            mysql_close(my);

            return true;
        }

        
        bool GetAllQuestions(std::vector<Question> *out)
        {
            std::string sql = "select * from ";
            sql += oj_questions;

            
            return QueryMySql(sql, out);
        }

        bool GetOneQuestions(const std::string &number, Question *q)
        {
           bool ret = false;
            std::string sql = "select * from ";
            sql += oj_questions;
            sql += " where number=";
            sql += number;
            std::vector<Question> result;
            if(QueryMySql(sql, &result))
            {
                if(result.size() == 1)
                {
                    *q = result[0];
                    ret = true;
                }
            }
            return ret;
        }
        


        ~Model()
        {}
    };
}